Comcast calls its service High-Speed 2go, and it’s bundled with other triple-play services from Comcast. The service is available to customers through wireless data cards.

"With Comcast's wideband Internet, we already offer one of the fastest wired connections available today. Now with the launch of High-Speed 2go, we also deliver the nation's fastest wireless Internet," said Cathy Avgiris, senior vice president and general manager for wireless and voice services at Comcast. "Innovation through mobility is one of many advances Comcast is providing consumers in the area of entertainment, information and communications. Comcast High-Speed 2go now gives consumers the best of both worlds, the fastest fast at home and on the go."

Comcast is selling two different data cards and service plans:

Comcast High-Speed 2go Metro service uses a 4G-only data card, giving customers wireless service within the 4G metro coverage area, according to Comcast. The Metro device operates only in a 4G service footprint.

Comcast High-Speed 2go Nationwide service delivers the metro 4G service plus coast-to-coast access on Sprint's national 3G network. The Nationwide device switches between available 4G and 3G networks.

Comcast said its subscribers will have bundled access to both the fastest wired and wireless Internet in the nation, which will be sold together at launch as a "Fast Pack" for as low as $49.99 per month for one year. Both new and existing Comcast customers will be eligible for special bundled pricing, with triple-play customers receiving 4G wireless as an add-on for as low as $30 per month.

The $49.99 Fast Pack Metro service includes Comcast's 12 Mbps home Internet service, a free Wi-Fi router for mobility and extended coverage in the home, and 4G service that will provide 3 to 6 Mbps average download speeds when customers are on the go. For another $20 per month, customers can upgrade to the Fast Pack Nationwide service that includes the same services plus nationwide 3G mobile network access.

Comcast’s 4G service is available in Atlanta and Portland, and the nation’s largest cable operator said Chicago, Philadelphia and other markets will launch the service before the end of the year.